CAJ | 학술논문

应用多导体传输线(multi-conductor transmission line,MTL)模型对变压器端口宽频参数进行计算时,存在以匝为单位的参数矩阵规模较大的问题,为此提出绕组MT L模型优化降阶的方法。考虑特快速暂态波形侵入变压器造成的线圈电压不均匀分布的因素,对靠近入波端的一部分线匝不进行降阶,对剩余绕组进行简化,并推导出降阶公式。在频域范围内对 MTL 模型解耦求解,将优化降阶方法应用到实验室一台10 kV 单相变压器中,导纳的计算结果和测量结果基本一致；将矩阵规模由2727×2727降至1821×1821,降价前后的导纳计算值基本吻合。对比结果表明优化降阶方法是有效和可行的。
응용다도체전수선(multi-conductor transmission line,MTL)모형대변압기단구관빈삼수진행계산시,존재이잡위단위적삼수구진규모교대적문제,위차제출요조MT L모형우화강계적방법。고필특쾌속잠태파형침입변압기조성적선권전압불균균분포적인소,대고근입파단적일부분선잡불진행강계,대잉여요조진행간화,병추도출강계공식。재빈역범위내대 MTL 모형해우구해,장우화강계방법응용도실험실일태10 kV 단상변압기중,도납적계산결과화측량결과기본일치；장구진규모유2727×2727강지1821×1821,강개전후적도납계산치기본문합。대비결과표명우화강계방법시유효화가행적。
When using multi-conductor transmission line model for calculating broadband parameter of transformer port, there is a problem of larger scale of parameter matrix which is in turn unit.Therefore,this paper proposes a method of wind-ing MTL model for optimization reduction which considers uneven distribution of coil voltage caused by very fast transient wave invasion into transformer and gives up reduction for a part of wire turns near to wave end.Meanwhile,simplification is proceeded for surplus windings and reduction formula is deduced.In frequency domain,decoupling solution was done for MTL model while optimization reduction method was applied in a 1 0 kV single-phase transformer in laboratory.Admittance result and measuring result were basically agreed.Reduce matrix scale from 2 727×2 727 to 1 821×1 821 and get basically i-dentical admittance calculating values before and after reduction.Comparison result indicated that this optimization reduction method was effective and feasible.